On the other hand, the mean levels of IFN-γ in both left and right hemispheres of the rAAV2/GFP-treated rats with no tumor implantation [AAV2/GFP L(no) and AAV2/GFP R(no) groups] were all below 40 pg/mg, near the pre-treated level, indicating that rAAV2/GFP did not induce IFN-γ immunoresponse. The gene discussed is IFNG; the disease is neoplasm.